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Nature-Inspired Capillary-Driven Welding Process for Boosting Metal-Oxide Nanofiber Electronics
- Source :
- ACS Applied Materials & Interfaces; May 2018, Vol. 10 Issue: 24 p20703-20711, 9p
- Publication Year :
- 2018
-
Abstract
- Recently, semiconducting nanofiber networks (NFNs) have been considered as one of the most promising platforms for large-area and low-cost electronics applications. However, the high contact resistance among stacking nanofibers remained to be a major challenge, leading to poor device performance and parasitic energy consumption. In this report, a controllable welding technique for NFNs was successfully demonstrated via a bioinspired capillary-driven process. The interfiber connections were well-achieved via a cooperative concept, combining localized capillary condensation and curvature-induced surface diffusion. With the improvements of the interfiber connections, the welded NFNs exhibited enhanced mechanical property and high electrical performance. The field-effect transistors (FETs) based on the welded Hf-doped In2O3(InHfO) NFNs were demonstrated for the first time. Meanwhile, the mechanisms involved in the grain-boundary modulation for polycrystalline metal-oxide nanofibers were discussed. When the high-k ZrOxdielectric thin films were integrated into the FETs, the field-effect mobility and operating voltage were further improved to be 25 cm2V–1s–1and 3 V, respectively. This is one of the best device performances among the reported nanofibers-based FETs. These results demonstrated the potencies of the capillary-driven welding process and grain-boundary modulation mechanism for metal-oxide NFNs, which could be applicable for high-performance, large-scale, and low-power functional electronics.
Details
- Language :
- English
- ISSN :
- 19448244
- Volume :
- 10
- Issue :
- 24
- Database :
- Supplemental Index
- Journal :
- ACS Applied Materials & Interfaces
- Publication Type :
- Periodical
- Accession number :
- ejs45691285
- Full Text :
- https://doi.org/10.1021/acsami.8b05104